netdev - [PATCH net-next v4 1/4] skbuff: introduce kfree_skb_list

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Date:   Sat, 26 Feb 2022 00:49:26 -0800
From:   Dongli Zhang <dongli.zhang@...cle.com>
To:     netdev@...r.kernel.org, bpf@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, davem@...emloft.net, kuba@...nel.org,
        rostedt@...dmis.org, mingo@...hat.com, ast@...nel.org,
        daniel@...earbox.net, andrii@...nel.org, imagedong@...cent.com,
        joao.m.martins@...cle.com, joe.jin@...cle.com, dsahern@...il.com,
        edumazet@...gle.com
Subject: [PATCH net-next v4 1/4] skbuff: introduce kfree_skb_list_reason()

This is to introduce kfree_skb_list_reason() to drop a list of sk_buff with
a specific reason.

Cc: Joao Martins <joao.m.martins@...cle.com>
Cc: Joe Jin <joe.jin@...cle.com>
Signed-off-by: Dongli Zhang <dongli.zhang@...cle.com>
Reviewed-by: David Ahern <dsahern@...nel.org>
---
 include/linux/skbuff.h |  2 ++
 net/core/skbuff.c      | 11 +++++++++--
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 31be38078918..bc3f7822110c 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -1176,6 +1176,8 @@ static inline void kfree_skb(struct sk_buff *skb)
 }
 
 void skb_release_head_state(struct sk_buff *skb);
+void kfree_skb_list_reason(struct sk_buff *segs,
+			   enum skb_drop_reason reason);
 void kfree_skb_list(struct sk_buff *segs);
 void skb_dump(const char *level, const struct sk_buff *skb, bool full_pkt);
 void skb_tx_error(struct sk_buff *skb);
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index b32c5d782fe1..b4193eab3083 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -777,15 +777,22 @@ void kfree_skb_reason(struct sk_buff *skb, enum skb_drop_reason reason)
 }
 EXPORT_SYMBOL(kfree_skb_reason);
 
-void kfree_skb_list(struct sk_buff *segs)
+void kfree_skb_list_reason(struct sk_buff *segs,
+			   enum skb_drop_reason reason)
 {
 	while (segs) {
 		struct sk_buff *next = segs->next;
 
-		kfree_skb(segs);
+		kfree_skb_reason(segs, reason);
 		segs = next;
 	}
 }
+EXPORT_SYMBOL(kfree_skb_list_reason);
+
+void kfree_skb_list(struct sk_buff *segs)
+{
+	kfree_skb_list_reason(segs, SKB_DROP_REASON_NOT_SPECIFIED);
+}
 EXPORT_SYMBOL(kfree_skb_list);
 
 /* Dump skb information and contents.
-- 
2.17.1